I tried via Stylish extension.
@-moz-document url-prefix(about:newtab) {*{background-color:#000000;}}
But doesn't work.
If author of the vid will delete it , then reupload this vid to Bitchute.com (:D) or read text version of instructions :
about:profiles
mkdir chrome
command in terminal or via right click button of your mouse.Paste this code to your "userContent.css" file :
@-moz-document url("about:newtab") { body { background-color: #000000 !important; } }
Restart your browser manually or by clickin "Restart normally..." button in about:profiles
adress.
You will get results that you need ! :)